I'll try to keep this short in hopes to get some responses. My periods are always 4-5 days. Back in June I had a 2 days period, took a pregnancy test 5 days before Julys period, and got a faint positive. I ended up getting my period, again 2 days. I've been regular since then. I was hoping to be pregnant this time around but got my period Thursday. Filled 1/4 a menstrual cup, then no trace of it the next day. So a one day period. I've tested 3 times before this period was due and all were very negative. Should I test again? Or are these random short periods just something that happens sometimes.